| $1–2 million | LONG WAVE, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LORRAINE T. WILSON, M.D., PC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LOUIE'S ON THE LAKE, LLC | OKLAHOMA CITY, OK | BancFirst |
| $1–2 million | LOUIS V LEPAK TRUCKING CO INC | OKLAHOMA CITY, OK | Prosperity Bank |
| $350,000–1 million | LOVE, BEAL, & NIXON, PC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LOVING CARE MANAGEMENT, INC. | OKLAHOMA CITY, OK | InterBank |
| $350,000–1 million | LOWRY LAND CO., INC. | OKLAHOMA CITY, OK | BOKF, National Association |
| $5–10 million | LSB INDUSTRIES, INC | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | LTAC HOSPITAL OF EDMOND, LLC | OKLAHOMA CITY, OK | Newtek Small Business Finance, Inc. |
| $350,000–1 million | LTR FASTENER AND SUPPLY, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LUCAS HOLDINGS, LLC | OKLAHOMA CITY, OK | Wintrust Bank, National Association |
| $150,000–350,000 | LUSH FASHION LOUNGE, LLC | OKLAHOMA CITY, OK | F & M Bank |
| $350,000–1 million | LUTHERAN SENIOR CITIZENS INC | OKLAHOMA CITY, OK | Prosperity Bank |
| $150,000–350,000 | LUTON & CO PLLC | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $150,000–350,000 | LV, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LWPB, PC | OKLAHOMA CITY, OK | Prosperity Bank |
| $350,000–1 million | LYNN HEALTH SCIENCE INSTITUTE, INC. | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | LYRIC THEATRE OF OKLAHOMA, INC | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | LYTLE, SOULE & FELTY, P.C. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | M & M INSULATION, INC | OKLAHOMA CITY, OK | Frontier State Bank |
| $150,000–350,000 | M & M DITCHING, INC. | OKLAHOMA CITY, OK | Prosperity Bank |
| $1–2 million | M&M ACQUISITION, LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $1–2 million | M&N DEALERSHIPS XII, LLC | OKLAHOMA CITY, OK | International Bank of Commerce |
| $350,000–1 million | M&S HEALTHCARE MANAGEMENT LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | M5, INCORPORATED | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MA+ ARCHITECTURE | OKLAHOMA CITY, OK | Armstrong Bank |
| $350,000–1 million | MACARTHUR ASSOCIATES CONSULTANTS, LLC | OKLAHOMA CITY, OK | First-Citizens Bank & Trust Company |
| $2–5 million | MACH RESOURCES LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $350,000–1 million | MACKELLAR, INC. | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | MADCO CORP | OKLAHOMA CITY, OK | RCB Bank |
| $350,000–1 million | MAGIC SERVICES, INC | OKLAHOMA CITY, OK | RCB Bank |
| $2–5 million | MAGNUM FOODS, INC. | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | MAHAFFEY & GORE, PC | OKLAHOMA CITY, OK | International Bank of Commerce |
| $350,000–1 million | MAHOGANY- DOWNTOWN OKC, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MAHOGANY-OKC, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MAKE-A-WISH FOUNDATION OF OKLAHOMA, INC. | OKLAHOMA CITY, OK | Legacy Bank |
| $350,000–1 million | MAMA ROJA, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MANAGISTIX, INC. | OKLAHOMA CITY, OK | Legacy Bank |
| $150,000–350,000 | MANSELL & ENGEL, P.C. | OKLAHOMA CITY, OK | Regent Bank |
| $150,000–350,000 | MAR-K SPECIALIZED MANUFACTURING, INC | OKLAHOMA CITY, OK | First National Bank of Oklahoma |
| $150,000–350,000 | MARCELOS LLC | OKLAHOMA CITY, OK | First Enterprise Bank |
| $350,000–1 million | MARIANNE'S RENTALS FOR SPECIAL EVENTS | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $150,000–350,000 | MARIPOSA MEDSPA, LLC | OKLAHOMA CITY, OK | INTRUST Bank, National Association |
| $150,000–350,000 | MARK A DAWKINS MD PC | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | MARK BURSON, GENERAL AGENT | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | MARQUIS LABS, LLC | OKLAHOMA CITY, OK | Legacy Bank |
| $150,000–350,000 | MARTIN BIONICS INNOVATIONS, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MARTINDALE CONSULTANTS INC. | OKLAHOMA CITY, OK | The First State Bank |
| $150,000–350,000 | MASS ARCHITECTS,INC | OKLAHOMA CITY, OK | First National Bank of Oklahoma |
| $350,000–1 million | MATHIS MANAGEMENT INC | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | MATTHEWS TRENCHING CO., INC | OKLAHOMA CITY, OK | RCB Bank |
| $150,000–350,000 | MAXEY'S CYCLE, INC. | OKLAHOMA CITY, OK | First Enterprise Bank |
| $350,000–1 million | MAXWELL SUPPLY COMPANY | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | MAYCO INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MAYES & MAYES OPTOMETRY, PLLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MAZAHERI LAW FIRM PLLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MB OKC LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $5–10 million | MCAFEE & TAFT, A PROFESSIONAL CORPORATION | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | MCATTEE & WOODS PC | OKLAHOMA CITY, OK | BOKF, National Association |
| $5–10 million | MCBRIDE CLINIC ORTHOPEDIC HOSPITAL | OKLAHOMA CITY, OK | MidFirst Bank |
| $350,000–1 million | MCCLAIN'S RV SUPERSTORE OKC WEST, INC | OKLAHOMA CITY, OK | Pointbank |
| $350,000–1 million | MCCORKLE TRUCK LINE, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MCCOY & ORTA, PC | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | MCINTYRE LAW P.C. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MCV ENTERPRISES, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MEADE OIL AND GAS LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | MEDALLION RESOURCES, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MEDIA RESOURCES INC | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | MEDICAL CENTER PAIN CLINIC | OKLAHOMA CITY, OK | Arvest Bank |
| $2–5 million | MEDLEY MATERIAL HANDLING COMPANY | OKLAHOMA CITY, OK | International Bank of Commerce |
| $2–5 million | MERCER VALVE CO., INC. | OKLAHOMA CITY, OK | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | MERIDIAN HOTEL LLC | OKLAHOMA CITY, OK | Fidelity Bank, National Association |
| $150,000–350,000 | MERRITT SEALING CO. | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $150,000–350,000 | MESSIAH LUTHERAN CHURCH, INC. | OKLAHOMA CITY, OK | International Bank of Commerce |
| $350,000–1 million | METHENY CONCRETE PRODUCTS INC. | OKLAHOMA CITY, OK | Prime Bank |
| $350,000–1 million | METRO GLASS, INC. | OKLAHOMA CITY, OK | NBC Oklahoma |
| $150,000–350,000 | METRO GRANITE, LLC | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | METRO RESTAURANT ASSOCIATES, INC | OKLAHOMA CITY, OK | Arvest Bank |
| $350,000–1 million | METRO SIGN CORPORATION | OKLAHOMA CITY, OK | Cornerstone Bank |
| $150,000–350,000 | METRO SURFACES, LLC | OKLAHOMA CITY, OK | Valliance Bank |
| $350,000–1 million | METRO-TECH ELECTRICAL CONTRACT | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | METROPLEX CONSTRUCTION, INC. | OKLAHOMA CITY, OK | First Fidelity Bank |
| $350,000–1 million | METROPOLITAN AIR CONDITIONING CO. | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | METROPOLITAN BETTER LIVING CENTER INC | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | METROPOLITAN BIBLE CHURCH | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MEXICAN RADIO, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MI OPS LLC | OKLAHOMA CITY, OK | First Oklahoma Bank |
| $150,000–350,000 | MICHAEL BROOKS-JIMENEZ, P.C. | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | MICHAEL'S GRILL, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MID AMERICA ROOFING & CONSTRUCTION INC | OKLAHOMA CITY, OK | First National Bank of Oklahoma |
| $150,000–350,000 | MID DEL WINGS LLC | OKLAHOMA CITY, OK | RCB Bank |
| $2–5 million | MID-AMERICA CHRISTIAN UNIVERSITY, INC | OKLAHOMA CITY, OK | CrossFirst Bank |
| $150,000–350,000 | MID-CON DATA SERVICES, LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $350,000–1 million | MID-CONTINENT GROUP, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MID-DEL GROUP HOME INC | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | MID-DEL VISION SOURCE, PLLC | OKLAHOMA CITY, OK | Valor Bank |
| $150,000–350,000 | MID-SOUTH CONTRACTING LLC | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | MID-STATES OILFIELD MACHINE, LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | MID-STATES WHOLESALE LUMBER CO. | OKLAHOMA CITY, OK | Shamrock Bank, National Association |
| $2–5 million | MID-WEST HOSE & SPECIALTY, INC | OKLAHOMA CITY, OK | BancFirst |